The detection of defects in blood coagulation.
D001778:Blood Coagulation Disorders / Q000175:diagnosis*; D001780:Blood Coagulation Tests; D003937:Diagnosis, Differential; D006467:Hemophilia A / Q000175:diagnosis; D002836:Hemophilia B / Q000175:diagnosis; D006801:Humans; D007753:Laboratories / Q000706:statistics & numerical data; D011517:Prothrombin Time